I can literally go on the calendar, add a location which will interface with the maps app, which can give me reviews, menus, directions, etc. Add people from my contacts, who use any type of email and cal they like (not limited to WhatsApp users) and have an email sent off with an ICS file to add to their calendar of choice. Provide a drive attachment in the same calendar invite if there was something to discuss with this meetup...

Feeding all my info to a Chinese app isn't going to somehow improve that. My larger interest is in breaking up the aggregation of data by a single entity.